[Question] How can we use underscore "_" in sensor name?

[Johnathan Mantey]

On 9/14/21 9:57 PM, Heyi Guo wrote:
> Hi Johnathan,
> 
> The code in dbus-sensors will translate sensor name by replacing space " 
> " to "_", e.g. ADCSensor.cpp:
> 
> 53     Sensor(boost::replace_all_copy(sensorName, " ", "_"),
> 
> Then in phosphor-ipmi-host dbus-sdr/sensorcommands.cpp, it will try to 
> revert "_" back to " ":
> 
>   419     std::replace(name.begin(), name.end(), '_', ' ');
> 
> The first conversion does nothing for our case, but the 2nd conversion 
> will unconditionally convert "_" to space " ".
> 
> If we don't really forbid to use "_" in sensor names, I think we'd 
> better replace space " " with %20 in dbus-sensors, and convert %20 back 
> to " " in ipmi-host.
> 

Rereading your original post you were having issues with sensor names 
you explicitly had "_" characters, and the line on 419 turns it into a 
blank space. The underscore character is overloaded at the D-Bus level.

I expect there may be an issue with my proposed solution, as D-Bus is 
probably not going to allow the use of the '%' character. A solution 
that fits within the D-Bus naming rules will be required to provide a 
reliable encode/decode scheme.

<snip>

-- 
Johnathan Mantey
Senior Software Engineer
*azad te**chnology partners*
Contributing to Technology Innovation since 1992
Phone: (503) 712-6764
Email: johnathanx.mantey at intel.com <mailto:johnathanx.mantey at intel.com>


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